src/nepi/resources/ns3/ns3application.py

   1 #
   2 #    NEPI, a framework to manage network experiments
   3 #    Copyright (C) 2014 INRIA
   4 #
   5 #    This program is free software: you can redistribute it and/or modify
   6 #    it under the terms of the GNU General Public License version 2 as
   7 #    published by the Free Software Foundation;
   8 #
   9 #    This program is distributed in the hope that it will be useful,
  10 #    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 #    GNU General Public License for more details.
  13 #
  14 #    You should have received a copy of the GNU General Public License
  15 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 #
  17 # Author: Alina Quereilhac <alina.quereilhac@inria.fr>
  18
  19 from nepi.execution.resource import clsinit_copy, ResourceState
  20 from nepi.resources.ns3.ns3base import NS3Base
  21
  22 @clsinit_copy
  23 class NS3BaseApplication(NS3Base):
  24     _rtype = "abstract::ns3::Application"
  25
  26     def __init__(self, ec, guid):
  27         super(NS3BaseApplication, self).__init__(ec, guid)
  28         self._node = None
  29
  30     @property
  31     def node(self):
  32         if not self._node:
  33             from nepi.resources.ns3.ns3node import NS3BaseNode
  34             nodes = self.get_connected(NS3BaseNode.get_rtype())
  35
  36             if not nodes:
  37                 msg = "Application not connected to node"
  38                 self.error(msg)
  39                 raise RuntimeError(msg)
  40
  41             self._node = nodes[0]
  42
  43         return self._node
  44
  45     @property
  46     def _rms_to_wait(self):
  47         rms = set()
  48         rms.add(self.node)
  49         return rms
  50
  51     def _connect_object(self):
  52         node = self.node
  53         if node.uuid not in self.connected:
  54             self.simulation.invoke(node.uuid, "AddApplication", self.uuid)
  55             self._connected.add(node.uuid)
  56
  57     def do_stop(self):
  58         if self.state == ResourceState.STARTED:
  59             # No need to do anything, simulation.Destroy() will stop every object
  60             self.info("Stopping command '%s'" % command)
  61             self.simulation.invoke(self.uuid, "Stop")
  62             self.set_stopped()
  63
  64     def do_start(self):
  65         if self.simulation.state < ResourceState.STARTED:
  66             self.debug("---- RESCHEDULING START ----" )
  67             self.ec.schedule(self.reschedule_delay, self.start)
  68         else:
  69             super(NS3BaseApplication, self).do_start()
  70             self._start_time = self.simulation.start_time
  71
  72     @property
  73     def state(self):
  74         if self._state == ResourceState.STARTED:
  75             try:
  76                 is_running = self.simulation.invoke(self.uuid, "isAppRunning")
  77
  78                 if not is_running:
  79                     self.set_stopped()
  80             except:
  81                 msg = "Application failed. Can not retrieve state"
  82                 out = ""
  83
  84                 import traceback
  85                 err = traceback.format_exc()
  86                 self.error(msg, out, err)
  87                 self.do_fail()
  88
  89         return self._state
  90